The coupling reaction of Fe bio-oxidation and resulting Fe hydrolysis drastically improve the formation of iron hydroxysulfate minerals in AMD.

The oxidation of Fe by () in acid mine drainage (AMD) is often accompanied by formation of iron hydroxysulfate minerals, such as schwertmannite and jarosite. This study reported that 80 mmol L of Fe could be completely oxidized by LX5 within 48 h, but only 27.7% of the resultant Fe precipitated to form schwertmannite.

Photocatalytic reduction of Cr(VI) by citric and oxalic acids over biogenetic jarosite.

In this study, a series of bath experiments were carried out to investigate the photoreduction of Cr(VI) by small molecular weight organic acids (SOAs) over jarosite, a mineral found in acid mine drainage (AMD). The results demonstrated that jarosite or SOAs alone was unable to effectively transform Cr(VI) to Cr(III) even if exposed to an illumination of mimic solar light. However, an addition of jarosite significantly enhanced the reduction of Cr(VI) by SOAs under the same condition.